org.tsm.concharto.service.KmlExportService.java Source code

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Here is the source code for org.tsm.concharto.service.KmlExportService.java

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/*******************************************************************************
 * Copyright 2009 Time Space Map, LLC
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package org.tsm.concharto.service;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.springframework.orm.hibernate3.SessionFactoryUtils;
import org.springframework.orm.hibernate3.SessionHolder;
import org.springframework.scheduling.quartz.QuartzJobBean;
import org.springframework.transaction.support.TransactionSynchronizationManager;
import org.tsm.concharto.audit.AuditInterceptor;
import org.tsm.concharto.dao.EventDao;
import org.tsm.concharto.model.Event;
import org.tsm.concharto.util.KmlFormat;

/**
 * Periodically writes all Concharto events into KML file(s)
 */
public class KmlExportService extends QuartzJobBean {
    private static final String CHARACTER_ENCODING = "UTF-8";
    private final Log log = LogFactory.getLog(getClass());
    private EventDao eventDao;
    private EventSearchService eventSearchService;
    private AuditInterceptor auditInterceptor;
    private SessionFactory sessionFactory;
    private String kmlFileName;

    public void setEventDao(EventDao eventDao) {
        this.eventDao = eventDao;
    }

    public void setEventSearchService(EventSearchService eventSearchService) {
        this.eventSearchService = eventSearchService;
    }

    public void setSessionFactory(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    public void setAuditInterceptor(AuditInterceptor auditInterceptor) {
        this.auditInterceptor = auditInterceptor;
    }

    public void setKmlFileName(String kmlFileName) {
        this.kmlFileName = kmlFileName;
    }

    @Override
    protected void executeInternal(JobExecutionContext context) throws JobExecutionException {
        setupTransactionFactory();

        Integer total = eventDao.getTotalCount();
        log.debug("running export task for " + total + " events");
        //TODO FIXME!! 5-4-08
        //TODO we need to split this up later! otherwise we will run out of ram
        List<Event> events = eventSearchService.search(2000, 0, null,
                new SearchParams(null, null, Visibility.NORMAL, true, null, null));
        log.info("retrieved " + total + " events");

        FileOutputStream fileOutputStream = null;
        try {
            //TODO FIXME hack..
            fileOutputStream = new FileOutputStream("../webapps/ROOT/" + kmlFileName);
            OutputStreamWriter outputStreamWriter = new OutputStreamWriter(fileOutputStream, CHARACTER_ENCODING);
            KmlFormat.toKML(events, outputStreamWriter);
        } catch (FileNotFoundException e) {
            log.error(e);
        } catch (UnsupportedEncodingException e) {
            log.error(e);
        } finally {
            try {
                fileOutputStream.close();
            } catch (IOException e) {
                log.error(e);
            }
        }
        log.info("wrote kml for " + events.size() + " events");

        postProcessTransactionFactory();
    }

    public void setupTransactionFactory() {
        Session session = SessionFactoryUtils.getSession(sessionFactory, auditInterceptor, null);
        TransactionSynchronizationManager.bindResource(sessionFactory, new SessionHolder(session));
    }

    public void postProcessTransactionFactory() {
        // single session mode
        SessionHolder sessionHolder = (SessionHolder) TransactionSynchronizationManager
                .unbindResource(sessionFactory);
        SessionFactoryUtils.closeSession(sessionHolder.getSession());
    }

}